Device for coarse and fine setting of the loop length in flat hosiery machines



' y 1932- P. LIEBERKNECHT 1,867,703

DEVICE FOR COARSE AND FINE SETTING OF THE LOOP LENGTH IN FLAT HOSIERY MACHINES Filed June 16, 1930 Patented July 19, 1932 UNITED STATES PATENT OFFICE PAUL LIEBERKNECHT, OF EINSIEDEL, NEAR CHEMNITZ, GERMANY, ASSIGNOR OF ONE- HALF TO MASCHINENFABRIK-EINSIEDEL, HAFTUNG, OF EINSIEDEL, NEAR GHEMNITZ,

Application filed June 16, 1930, Serial No.

The known and most frequently suitable device for setting the length of loop desired at the moment in fiat hosiery machines consists of a lever pair which embraces a shaft connected by motion transmission means to the needle bar. One lever of the pair embraces the shaft loosely and has at its upper, free end a when mounted on a bolt and pressed constantly against the face of a loosening and closing cam. The second lever stands in front of this roller lever and carries a .set screw which serves as an abutment for the roller lever. The extent of the throw of the lever provided with set screw is dependent on-the distance of the set screw from the roller lever, and the lever provided with the set screw transfers its throw to the shaft secured there to and therefore to the needle bar by means of the known motion transmission means. WVith this known setting device, it has been shown in practice that owing to high pres sure exerted on the set screw it can be turned only with very great difficulty for the purpose of altering the needle bar osition. This disadvantage is not removed y the known proposal to mount an axially displacable screw threaded spindle, which serves for the fine setting, in a screw threaded spindle with steep pitch which serves-for the coarse setting and to turn the two spindles jointly by means of ahand lever connected to them. In operation of this known fine setting spindle, the lever arm to which the force is applied remains the same as when using the coarse setting spindle, on the spindles themselves is not reduced.

The object of the present invention is to remove this disadvantage.

The device according to the present invention also has a coarse setting and a fine setting, the fine setting however being arranged outside the coarse setting and on a separate lever which is longer than the lever for coarse setting, and this third lever being situated between the known roller lever and the lever which carries the coarse setting. The ratio between the levers of the two setting devices is such that the fine setting can be effected by hand without toil.

In the accompanying drawing, the invenso that the pressure acting I the roller bolt a in the construction ing to Figures 3 and 4, and also has a sur- GESELLSCHAFT MIT IBESCHRANK GERMANY LENGTH IN FLAT HOSIERY 461,479, and in Germany June 21, 1929.

tion is illustrated in two constructional examples. In the drawingv Figure 1 shows in side elevation, a device according to the invention, with intermediate lever turnably mounted on the oscillatable shaft.

Figure 2 shows the same device in front elevation, and

Figures 3 and 4 show the intermediate lever turnably mounted on the roller bolt, in views which correspond with Figures 1 and 2.

Referring to the drawing, as heretofore a forked lever c is mounted loosely on the shaft 6 which is oscillatable and acts on the needle bar in the known way through suitable motion transmission means. One suitable motion transmission means is disclosed in the specification of F. Ceckas PatentNo. 1,213,333 issued January 23rd, 1917. The lever 0 carries at its free end a roller (1 which is mounted on a bolt a and is pressed constantly on the face of the known loosening and closing cam f by means of the lever .0 and a-tension spring e. A surface It is cast on the bridge piece 9 which connects together the forked-parts of the roller lever 0 in the construction according to Figures 1 and 2, or on the eye 9 I which embraces loosely the shaft 6 in the constructionaccording to Figures 3 and a.

The point of a set screw 5 lies against the surface '11., and the set screw is provided rotatably in a lever is and serves for the fine setting. This new lever is is mounted loosely on the shaft 6 in the construction according to Figures 1 and 2 and is mounted loosely on accordface m against which also lies a screw threaded spindle n which is rotatable by means of 'a hand lever 0 and serves for the coarse setting. The last named spindle n is mounted in the already known, but also forked, lever p which is secured to the shaft 12 to-move therewith.

For the purpose of setting the loo length accuratel the spindle n is first rought against t e stop surface m of the new intermediate lever is by means of the hand lever 0 and thereupon the fine setting is effected by rotation of the set screw i which is provided with a fine thread. The 'ratio between the Figure 3.

levers of the two setting devices ean'be chosen so' suitabl that the movement of the set screw 2' ta (es place very easily, the ratio for example being about 1: 2, as can be seen from I claim: 4

1. A device for coarse and fine setting of the loop length in flat hosiery machines,.comprising a cam, an oseillatable shaft, a lever loosely mounted on the shaft and acted on by the cam, a lever mounted on a part of the device and acted on by the first named lever, a

' lever which is shorter than the second named many this 3rd lever and fixed to the said shaft and acted on by the second named lever, adjustment means between the third and second named lever for obtaining the coarse setting, and motion transmission means between the said shaft and the needle bar.

2. In a device for coarse and fine setting of the loop length in flat hosiery machines according to claim 1, wherein the second named lever is mounted loosely on the oscillatable shaft and adjustment means is provided between the second named lever and the first named lever for varying the fine setting.

3. In a device for coarse and fine setting of the loop cordin to claim 1, wherein a bolt is provided on t 1e first named lever and a roller'is provided on the bolt and rides on the cam, and the second named lever is of greater len th than the third named lever and is mounted loosely on the said bolt. I

In testimony whereof, I havesigned my named to this specification at Dresden, GerdaIyLof June 1930.- PA LIEBERKNECHT.

length in flat hosiery machines ac- 

